EP4177482A1 - Federvorrichtung zur sicherung eines befestigers mit gewinde einer schraubverbindung und system zur sicherung einer schraubverbindung - Google Patents

Federvorrichtung zur sicherung eines befestigers mit gewinde einer schraubverbindung und system zur sicherung einer schraubverbindung Download PDF

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Publication number
EP4177482A1
EP4177482A1 EP22204897.7A EP22204897A EP4177482A1 EP 4177482 A1 EP4177482 A1 EP 4177482A1 EP 22204897 A EP22204897 A EP 22204897A EP 4177482 A1 EP4177482 A1 EP 4177482A1
Authority
EP
European Patent Office
Prior art keywords
ring
shaped
spring device
spring
inner peripheral
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22204897.7A
Other languages
English (en)
French (fr)
Inventor
Richard SUNDBERG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saab AB
Original Assignee
Saab AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saab AB filed Critical Saab AB
Publication of EP4177482A1 publication Critical patent/EP4177482A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
    • F16B39/26—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object with spring washers fastened to the nut or bolt-head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/20—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening
    • F16B2/22—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material
    • F16B2/24—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal
    • F16B2/241—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal
    • F16B2/243—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal internal, i.e. with spreading action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/284—Locking by means of elastic deformation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/34—Locking by deformable inserts or like parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002—Measures against loss of bolts, nuts or pins

Definitions

  • the present disclosure relates to a spring device for securing a threaded fastener of a bolted joint and a system for securing a bolted joint. More specifically, the disclosure relates to a spring device for securing a threaded fastener of a bolted joint and a system for securing a bolted joint as defined in the introductory parts of claim 1 and claim 11.
  • the object of the invention is to provide a spring device and a system for securing a bolted joint, in which the spring device can be used during a plurality of cycles with remained functionality.
  • a spring device for securing a threaded fastener of a bolted joint, characterized in that the spring device comprises at least one ring-shaped portion, and a plurality of elongate spring elements, wherein each spring element is attached at least in a first end to the at least one ring-shaped portion, wherein the at least one ring-shaped portion and a body formed by the plurality of spring elements have a common centre axis, wherein each spring element comprises an inner peripheral surface directed towards the centre axis, and wherein a first portion of the inner peripheral surface is closer to the centre axis than are other portions of the inner peripheral surface and closer to the centre axis than an inner peripheral surface of the at least one ring-shaped portion.
  • the spring device can be used in situations where conventional solutions are inadequate or impractical. One such situation are joints that needs to be loosened often.
  • Today's solutions such as anchor nuts or threaded inserts that used to ensure that the threaded bolt will not unscrew itself has a limited number of loosening cycles before they need to be replaced.
  • the material of the spring device is chosen such that the spring device is able to be used over at least ten, or at least fifty, or at least one hundred loosening cycles without performance degradation or need for replacement of the spring arrangement.
  • the spring device is arranged to be used in a fastener arrangement where the friction between the spring element and the fastener arrangement will ensure that the spring element stays in place in the fastener arrangement.
  • the inner peripheral surface of each spring element extends inwards relative the at least one ring-shaped portion and when the spring device encloses a head of a threaded fastener, the the inner peripheral surface of each spring element exerts a friction force against the head of the threaded fastener to keep the head of the threaded fastener from rotating relative the spring device and the fastener arrangement. This ensures that the head of the threaded fastener, and therefor also the threaded fastener itself, is not able to move longitudinally relative the spring arrangement and the threaded fastener will stay in place.
  • the at least one ring-shaped portion comprises a ring-shaped first portion and a ring-shaped second portion which is in alignment with the ring-shaped first portion and wherein the ring-shaped first portion and the ring-shaped second portion have a common centre axis, and wherein each of the spring elements is connected in a first end to the ring-shaped first portion and in an opposite second end to the ring-shaped second portion.
  • the ring-shaped first portion forms a first end portion of the spring device
  • the ring-shaped second portion forms a second end portion of the spring device.
  • the ring-shaped end portions add stability to the spring device.
  • the ring-shaped first portion and the ring-shaped second portion have generally the same geometry. Thereby, it will not matter which end is introduced first into a predetermined hole. Both ends may form an equally stable engagement structure towards a radial support surface in a hole that receives the spring device.
  • said first portion of the inner peripheral surface of the spring element is a central portion of the spring element in the direction of the centre axis, and said other portions are a respective neighboring portion on each opposite side of the first portion, wherein said other portions extend from the first portion to the ring-shaped first portion and the ring-shaped second portion respectively.
  • the at least one ring-shaped portion comprises a slit extending through said portion.
  • each of the ring-shaped first portion and the ring shaped second portion comprises a slit extending though said portion.
  • the spring element may comprise more than one slit, wherein the slit are located on the first and/or the second end portion.
  • each spring element is able to deform elastically from an unloaded state in which said first portion of the inner peripheral surface is closer to the centre axis than are the other portions of the inner peripheral surface to a deformed state in which said first portion of the inner peripheral surface is in alignment with said the other portions of the inner peripheral surface.
  • the spring device is able of deforming elastically, not plastically, to a state in which each spring element is generally rectilinear.
  • the spring device comprises a first material defining a core of each spring element and a layer of a second material applied on said first portion of the inner peripheral surface of the spring element, wherein the first material has a higher spring constant than the second material and the second material has a higher friction coefficient than the first material.
  • the spring device is arranged to enclose a head of a threaded fastener, wherein the friction surface of each spring element exerts a friction force against the head of the threaded fastener. It is therefore advantageously to increase the friction of the surface facing the head of the threading fastener.
  • the outer surface of the first end portion and the second end portion may also be covered with the the second material having a higher friction coefficient than the first material defining the core of the spring element. This will increase the friction between the first and second end portion.
  • an outer radius of the at least one ring-shaped portion defines the maximum outer radius of the spring device.
  • an outer radius of the ring-shaped first portion and an outer radius of the ring-shaped second portion are equal and define the maximum outer radius of the spring device.
  • a system for securing a bolted joint comprising a spring device according to the first aspect, a threaded fastener, and a fastener arrangement comprising a hole arranged to receive the spring device and a head of the threaded fastener, wherein the head of the threaded fastener has a radius which, in an unloaded state of the spring device, is larger than the distance from the first portion of the inner peripheral surface of each spring element to the centre axis of the spring device and an outer radius of the at least one ring-shaped portion of the spring device corresponds to an inner radius of the hole and a centre axis of the hole is in alignment with the centre axis of the spring device when the spring device is received in the hole.
  • the fastener arrangement comprises a sleeve defining said hole.
  • the fastener arrangement preferably also comprises a structural component that holds the sleeve in place, preventing it from rotating around said centre axis.
  • the at least one ring-shaped portion of the spring device comprises a slit extending through it
  • the fastener arrangement comprises a projection at an inlet to said hole, said projection having a distance to the centre axis of the hole which is less than the outer radius of the at least one ring-shaped portion of the spring device when the latter is in a non-compressed state in which the slit is open, and which distance is larger than the outer radius of the at least one ring-shaped portion of the spring device when the latter is in a compressed state in which the slit is closed.
  • Figure 1 shows a perspective view of the spring device 100 according to an embodiment of the present disclosure.
  • the first aspect of this disclosure shows a spring device 100 for securing a threaded fastener of a bolted joint (not shown).
  • the spring device 100 comprises a ring-shaped first end portion 102, a ring-shaped second end portion 104, and a plurality of elongate spring elements 106.
  • Each spring element 106 is attached in a first end 102a to the first end portion 102 and in an opposite second end 104a to the second end portion 104a.
  • the first end portion 102 and the second end portion 104 are in alignment and have a common centre axis.
  • Each spring element 106 comprises an inner peripheral surface 108 directed towards the centre axis, and wherein a first portion 108a of the inner peripheral surface 108 is closer to the centre axis than the other portions 108b of the inner peripheral surface 108.
  • the first portion 108a of the inner peripheral surface 108 is also closer to the centre axis than the inner peripheral surface of the first end portion 102 as well as the inner peripheral surface of the second end portion 104.
  • the first portion 108a of the inner peripheral surface of the spring element 106 is a central portion of the spring element 106 in the direction of the centre axis, and wherein said other portions are a respective neighboring portions on each opposite side of the first portion 108a, wherein said other portions extend from the first portion 108a to the ring-shaped first portion 102 and the ring-shaped second portion 104 respectively.
  • Each of the ring-shaped first portion 102 and the ring shaped second portion 104 comprises a slit 110 extending though said portion.
  • the slit enables the spring device 100 to be temporarily compressed to a smaller diameter.
  • the spring device 100 comprises a first material defining a core of each spring element 106 and a layer of a second material applied on said first portion 108a of the inner peripheral surface of the spring element 106, wherein the first material has a higher spring constant than the second material and the second material has a higher friction coefficient than the first material.
  • An outer radius of the ring-shaped first portion 102 and an outer radius of the ring-shaped second portion 104 are equal and define the maximum outer radius of the spring device 100.
  • Figures 2a-2b show perspective views of the system 200 for securing a bolted joint according to an embodiment of the present disclosure.
  • Figure 2a shows a perspective view of the system 200 for securing a bolted joint according to an embodiment of the present disclosure.
  • Figure 2b shows a perspective cross-sectional of the same system 200 as shown in Fig.2a .
  • the second aspect of this disclosure shows a system 200 for securing a bolted joint.
  • the system 200 comprises a spring device 100 according to the first aspect, a threaded fastener 202, and a fastener arrangement 204 comprising a hole 206 (shown in Fig. 2c ) arranged to receive the spring device 100 and a head 202a of the threaded fastener 202.
  • the head 202a of the threaded fastener 202 has a radius which is larger than the distance from the first portion 108a of the inner peripheral surface 108 of each spring element 106 to the centre axis of the spring device 100.
  • An outer radius of the at least one ring-shaped portion 102, 104 of the spring device 100 corresponds to an inner radius of the hole 206 and a centre axis of the hole 106 is in alignment with the centre axis of the spring device 100 when the spring device 100 is received in the hole.
  • the fastener arrangement 204 comprises a sleeve defining said hole 206.
  • the at least one ring-shaped portion 102, 104 of the spring device 100 comprises a slit 110 extending through it, and the fastener arrangement comprises a projection 112 at an inlet to said hole, said projection 112 having a distance to the centre axis of the hole which is less than the outer radius of the at least one ring-shaped portion 102, 104 of the spring device 100 when the latter is in a non-compressed state in which the slit 110 is open.
  • the distance is larger than the outer radius of the at least one ring-shaped portion 102, 104 of the spring device 100 when the latter is in a compressed state in which the slit 110 is closed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Connection Of Plates (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
EP22204897.7A 2021-11-03 2022-11-01 Federvorrichtung zur sicherung eines befestigers mit gewinde einer schraubverbindung und system zur sicherung einer schraubverbindung Pending EP4177482A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2100164A SE2100164A1 (en) 2021-11-03 2021-11-03 A spring device for securing a threaded fastener of a bolted joint and a system for securing a bolted joint

Publications (1)

Publication Number Publication Date
EP4177482A1 true EP4177482A1 (de) 2023-05-10

Family

ID=84047623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22204897.7A Pending EP4177482A1 (de) 2021-11-03 2022-11-01 Federvorrichtung zur sicherung eines befestigers mit gewinde einer schraubverbindung und system zur sicherung einer schraubverbindung

Country Status (4)

Country Link
US (1) US20230135460A1 (de)
EP (1) EP4177482A1 (de)
IL (1) IL297777A (de)
SE (1) SE2100164A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070003195A (ko) * 2005-06-30 2007-01-05 엘지전자 주식회사 결합장치
WO2018060055A1 (de) * 2016-09-30 2018-04-05 Witte Automotive Gmbh Vorrichtung zum ausgleichen von toleranzen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH353581A (de) * 1957-02-16 1961-04-15 Sulzer Ag Sicherungsvorrichtung für eine Schraubverbindung
US3648749A (en) * 1970-02-05 1972-03-14 Central Screw Co Fastener assembly with locking capabilities
US6478519B1 (en) * 2001-04-27 2002-11-12 Bamal Corporation Bolt retaining article
US8845251B2 (en) * 2011-04-25 2014-09-30 Bal Seal Engineering, Inc. Fastening devices, assemblies and related methods
TWI688714B (zh) * 2018-09-19 2020-03-21 恒昌行精密工業有限公司 防鬆脫之定位裝置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070003195A (ko) * 2005-06-30 2007-01-05 엘지전자 주식회사 결합장치
WO2018060055A1 (de) * 2016-09-30 2018-04-05 Witte Automotive Gmbh Vorrichtung zum ausgleichen von toleranzen

Also Published As

Publication number Publication date
US20230135460A1 (en) 2023-05-04
SE2100164A1 (en) 2023-05-04
IL297777A (en) 2023-06-01

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